/Engine/Plugins/Online/OnlineSubsystem/Source/Public/OnlineKeyValuePair.h
Convert aUStructinto a variant mapping table
true if it was successful, false otherwise
static bool UStructToVariantMap ( const [UStruct](API\Runtime\CoreUObject\UObject\UStruct) * StructDefinition, const void * Struct, [FOnlineKeyValuePairs](API\Plugins\OnlineSubsystem\FOnlineKeyValuePairs)< [FString](API\Runtime\Core\Containers\FString), [FVariantData](API\Plugins\OnlineSubsystem\FVariantData) > & OutVariantMap, int64 CheckFlags, int64 SkipFlags )